I've seen this art style over multiple websites in the past, but just can't seem to identify an underlying style/category for it. It seems to be some geometry based low-poly, but searches don't really match it. Is it maybe a subset of low-poly?

This tomato and elephant seem to be in a rather different style to the examples in the question. Your examples are definitely 3D, whereas the ones in the question are a sort of hybrid 2D-3D -- for example their heads are definitely 3D but their limbs are just 2D.
– David RicherbyNov 20 at 16:15

@DavidRicherby that's what I was trying to point out, Danielillo's answer summed it up excellently.
– WELZNov 20 at 16:41

1

FWIW "Low poly papercraft" is what I'd call it, and the result I get from Google image search appear to agree.
– MikeTheLiarNov 20 at 19:09